EFFECTS OF INBREEDING AXD CROSSBREEDING. 



63 



Table 14. — The average gain between birth and 33 days, in the different inbred families. 

 [The average in litters of each size and the index (see Table 9), 1906 to 1910 and 1911 to 1915.] 



Fam- 

 ily- 



1. 

 2- 

 3. 



7. 



9. 

 11. 

 13. 

 14. 

 15. 

 17. 

 IS. 

 19. 

 20. 

 21. 

 23- 

 24. 

 31. 

 32. 

 34. 

 35- 

 36. 

 3s 



Size of Utter, 1906-1910. 



1 



2 



Grams. 



Grams. 



207.2 



158.1 



158.8 



162.6 



208.3 



187.7 



181.0 



179. C 



229.6 



1S9.7 



205.0 



191.7 



212.3 



206.8 



217.3 



178.2 



225.0 



165.3 



163.3 



158.8 



187.5 



177.5 



212.0 



154.3 



182.6 



167.7 



217.3 



192.7 



215.0 



185.4 



172.3 



169.1 



201.2 



167.9 



180.3 



168.2 



165.0 



169.0 



184.4 



164.9 



192.1 



165.5 



200.4 



175.4 



\ 185.0 



184.3 



Grams 

 144.4 

 144.8 

 161. 

 150. 

 179.3 

 154.3 

 169.6 

 167.0 

 147.3 

 159.6 

 161.2 

 157.6 

 158.3 

 166. 

 165.0 

 153 

 156.6 

 149.3 

 172.6 

 151.4 

 163.1 

 178.3 

 150. 5 



Grams. 

 152.2 

 142.4 

 138.8 

 145.1 

 153.8 

 159.5 

 161.2 

 136.7 

 125.9 

 124.3 

 153.5 

 131.4 

 147.7 

 153.5 

 132.1 

 135.8 

 135.8 

 137.0 

 180.7 

 138.9 

 140.9 

 168.8 

 152.5 



Grams. Grams 

 173.0 

 95.0 



130.5 

 140.0 

 158.2 

 125.0 

 138.6 

 139.7 



120.3 

 140.0 

 121.3 

 114.4 

 151.7 

 137.3 

 135.6 

 139.6 

 128.0 

 147.5 

 147.6 

 136.5 

 127.3 



Index 



101.3 

 138.0 

 116.2 

 127. 8j 

 119.6 

 127.2 

 170. a 



114.0* 

 123.1 



131.0 



123.6 

 111.4 

 131. 7 

 132.5 



141.7 

 143.1 

 125.0 



156. 

 151. 



169. 

 K31. 

 182. 

 171. 

 183. 

 169. 

 156. 

 152. 

 167. 

 1.36. 

 161. 

 177. 

 169. 

 1.3.;. 

 160. 

 1.5-3. 

 172. 

 156. 

 162. 

 177. 

 161. 



Size of litter, 1911-1915. 



1 



2 



Grms. 



Grms. 



162.5 



157.9 



134.1 



137.5 



189.0 



173.2 



160.9 



161.5 



215.6 



186.8 



201.4 



194.3 



207.0 



178.7 



192.0 



164.0 





115.0 



175.3 



155.4 



169.3 



151.7 



153. C 



160.9 



169.7 



155.8 



190. C 



161.6 



176.8 



155.8 



171.1 



153.5 



171. C 



162.7 



165.8 



159.7 



116.5 



139.2 



162.5 



161.9 



188.6 



159.5 



223.9 



170.1 



181.0 



160.3 



Grms. Grms 

 102. 9 

 118.1 



156.5 

 148.0 

 148.0 

 157.1 

 150.9 

 140.7 

 165.0 

 131.8 

 139.8 

 127.5 

 129.1 

 137.2 

 124.3 

 146.4 

 145.8 

 131.1 

 133.8 

 143.8 

 141.9 

 152.1 

 144.3 



101.6 

 154.0 

 121.6 

 134.5 

 139.0 

 133.3 

 121.7 



Grms. 



112.4 

 155.0 

 129.7 

 140.6 

 132.8 

 129.9 



US. 8 

 127.5 

 122.1 

 100.9 

 123.4 

 102.8 

 131.3 

 118.5 

 129.4 

 137.9 

 129.9 

 132.2 

 131.2 

 112.3 



121.7 

 167.7 

 101.9 



98.0 

 145.0 

 125.0 



72.1 

 117.5 

 139.0 

 100.0 

 131.6 

 146.2 

 123.0 

 117.3 



Grms 



142.8 

 130.0 

 158.4 

 93.0 



93.3 



143. 



129.0 

 76.1 

 95.0 



Index 



126.2 

 122.2 

 164.2 

 148.0 

 163.7 

 169.1 

 161.4 

 149.0 



140.7 

 143.9 

 139.0 

 135.6 

 147.0 

 134.7 

 148.0 

 147.9 

 142.9 

 134.5 

 148.3 

 149.9 

 160.5 

 146.4 



Table 15. — The average weight at 33 days in the different inbred families. 

 [The average in litters of each size and the index (see Table 9), 1906 to 1910 and 1911 to 1915.] 







Size 



of Utter, 1906-1910. 







Size of Utter, 1911-1915. 





Fam- 















Index 





Index 



ily- 



























1 



2 



3 



4 



5 



6 





1 



2 



3 



4 



5 



6 







Grams. 



Grams. 



Grams. 



Grams 



Grams. 



Grams. 





Grms. 



Grmr. 



Grms. 



Grms. 



Grms. 



Grms. 





1 



311.7 

 269.5 



247.0 

 255.8 



219.2 

 226.0 



218.1 

 216.3 



245.5 

 159.8 



"i62."6 



236.6 

 237.4 



274.5 

 236.2 



253.0 

 220.9 



172.4 



188.4 







207.3 



2 



162.7 



176.9 





197.8 



3 



329.5 



285.1 



243.9 



210.9 



202.2 



199.5 



258.2 



303. 5 



270.0 



234.4 



229.5 



229.5 





251.0 



7 



287.5 



274.5 



232.0 



216.2 



20S.8 



179.5 



247.1 



270.1 



254.3 



239.8 



193.5 



194.5 



200.6 



233.9 



9 



-340. 5 



291.3 



265.2 



232.7 



225.1 



200.9 



274.1 



335.7 



284.9 



231.8 



211.3 



208.4 



192.0 



254.0 



11 



319.5 



287.3 



237.3 



237.3 



192.9 



183.3 



260.5 



318.6 



293.6 



243.9 



213.3 



205.2 



216.2 



260.2 



13 



331.3 



312.2 



255.9 



239.1 



212.1 



191.7 



277.0 



326.2 



280.7 



236.6 



207.0 201.8 



156.2 



252.9 



14 



329.5 

 349.5 

 270.4 



268.2 

 256.0 

 246.1 



250.7 

 233.0 

 235.9 



209.5 

 194.9 

 194.2 



210.7 



249.5 



255.6 

 243.9 

 234.1 



297.5 



'"278." 9 



260.1 

 229.5 

 245.0 



220.4 

 249.5 

 206.1 



196.2 







235.2 



15 









17 



185.0 



179.5 



184.7 



189.5 



176.2 



220.8 



18 



299.5 



275.2 



248.3 



227.5 



212.8 



180.9 



257.3 



281.9 



248.8 



226.4 



201.5 



245.5 





233.7 



19 



325.5 



246.8 



241.0 



207.1 



192.0 





244.4 



273.5 



260.1 



211.1 



196.8 



183.3 



159.5 



229.2 



20 



293.3 



257.1 



241.4 



226.4 



177.7 



195.5 



248.3 



275.2 



249.7 



208.7 



170.7 



163.5 





220.1 



21 



336.2 



290.0 



250.9 



231.0 



219.5 





267.2 



288.3 



249.7 



213.0 



189.5 



189.5 





226.8 



23 



327.0 



282.0 



251.3 



206.9 



207.2 



192.4 



259.2 



286.1 



249.8 



204.3 



168.5 



188.5 





219.0 



24 



277.7 



260.6 



232.8 



206.5 



201.4 



172.2 



240.4 



271.8 



236.8 



221.9 



197.5 



129.5: 



226.5 



31 



314.5 



264.4 



240.8 



206.9 



205.9 



196.2 



248.5 



281.5 



258.0 



224.5 



187. 4 



178. 8| 201. 3 



232.8 



32 



288. C 



261.2 



227.6 



207.3 



187.5 



186.2 



239.7 



272.5 



248.2 



208.1 



196.5 



199.5! 



224.3 



34 



249.5 



264.7 



261.7 



263.8 



217.8 





261.8 



218.7 



233.9 



218.7 



212.7 



159.5 



222.1 



35 



292.2 



254.8 



230.1 



212.2 



209.5 



200.2 



240.1 



269.5 



258.9 



225.9 



202.1 



197.4 



190.8 



235.4 



36 



299.5 



257.2 



245.4 



213.2 



201.8 



203.2 



247.9 



297.3 



252.1 



217.9 



199.1 



209.5 



142.8 



232.3 



38 



308.0 



268.8 



260.7 



244.9 



203.4 



186.2 



264.7 



348.4 



269.8 



236.0 



206.5 



197.5 



159.5 



251.5 



39. .. 



282.8 



272.6 



226.2 



224.5 







245.4 



277.7 



246.0 



221.2 



178.5 



174.0 





225.8 











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